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PNEUMATICALLY MOUNTED ELECTROMETER FOR REPRODUCTION MACHINES

Publishing Venue

Xerox Disclosure Journal

Abstract

An electrometer probe 10 is pneumatically biased above a test surface, such as photoreceptor 12, so as to maintain constant spacing therebetween. An air pressure supply 22 serves as a source of air pressure to passage 20 in mounting receptacle or shoe 14, as well as to upper and lower bellows 18 and l8- Arm 24 coupled to shoe 14 is pivoted about a point 16 connected, for example, to the reproduction machine frame (not shown), Any change in the spacing between lower portions of the shoe 14 and photorecep-'- tor 12 will result in a misbalance of pressure in the opposing bellows 18 and l8-. This will cause a change in length of lower bellows l8- in order to regain equilibrium, which, in turn, moves arm 24 a sufficient distance to maintain constant spacing of probe 10 from the photoreceptor 12 regardless of surface irregularities, etc.

Country

Undisclosed

Language

English (United States)

This text was extracted from a PDF file.

At least one non-text object (such as an image or picture) has been suppressed.

This is the abbreviated version, containing approximately
100% of the total text.

An electrometer probe 10 is pneumatically biased above a testsurface, such as photoreceptor 12, so as to maintain constantspacing therebetween.

Volume 2 Number 5 September/October 1977 1 fliU~

Proposed ClassificationU,S, Cl, 355/3P.

Int, Cl. G03g 15/00

An air pressure supply 22 serves as a source of air pressure topassage 20 in mounting receptacle or shoe 14, as well as toupper and lower bellows 18 and l8~ Arm 24 coupled to shoe 14is pivoted about a point 16 connected, for example, to thereproduction machine frame (not shown), Any change in thespacing between lower portions of the shoe 14 and photorecep~'~tor 12 will result in a misbalance of pressure in the opposingbellows 18 and l8~. This will cause a change in length oflower bellows l8~ in order to regain equilibrium, which, inturn, moves arm 24 a sufficient distance to maintain constantspacing of probe 10 from the photoreceptor 12 regardless ofsurface irregularities, etc.

Since the output reading of the electrometer may depend uponthe distance to the test surface, the above described conceptwill insure consistent measurements.